Pin.



G. H. FAHRENBRUCH.

PIN.

APPLICATION FILED IAN. 2s,l 1917.

19%5195 l Patel'lted June 26, 1917.

GEORGEH. FAHRENBRUCH, OF OMAHA, NEBRASKA.

rin'.

Specification of Letters Patent.

Patenten aan@ se, fait..

Application tiled January 26; 1917. Serial No'. 144,594.

To all 'whom it may concern.'

Be it known that I, GEORGE H. FAHREN- BnUoiI, a citizen of the United States, residing at `Oinaha, in the County of'Douglass and Statefof Nebraska, have invented certain new and useful lmprovements in Fins, of which the following is a specification.

My invention relates to a new and useful improvement in pins and especially in so providing a pin that on the insertion of a Cotter key or pin the Cotter key will be automatically spread or opened making it therefore unnecessary to place a screw driver or wedge or chisel between the leaves of the Cotter key to open the same.

Another object of my invention is to provide a pin provided with a bifurcated passage in the same so that the Cotter key will be automatically opened when driven through the pin and will not loosen or work out, but at the same time may be easily rebe held in a locked position without the use of a nut, and as before mentioned cotter keys are passed through holes in the ends of the pin, but by constant use or oversightfwork out and serious conditions often arise.

Another object of my invention is to provide a pin that will automatically spread the Cotter pin on insertion thereof and that will be very cheap to manufacture, easy to Construct, simple and practical in operation, and

necessitating but little labor on the same to make the pin perform its desired functions.

lith these and other objects in view my invention consists in certain new and novel constructions and combinations of parts that will hereinafter be more fully described and pointed out in the claims.

In the drawings, Figure 1 is a front View in elevation of my improved pin.

Fig. 2 1s a similar view showing the rear of the pin.l

5&5. Fig. 3 is a fragmental view taken at one side of the pin.

to remove the Cotter key.

Fig. 4 is a sectional view showing the y openings in said pins.

'F ig. 5 is a similar view showing a Cotter key partly inserted. l

Fig. 6 is also a similar view but with the cotter key in its final position.

Fig. 7 is a fragmental face view of the pin showing a rectangular opening.

Fig. 8 is a fragmental viewl from the rear of the pin showing rectangular opening, and

Fig. 9 is similar to Fig. 3 but showing a rectangular opening.

Referring now to the drawings a ymetal pin 1 of any conventional size is shown provided with the usual head 2. Near the lower end ofthe said pin and in what l term the front' face thereof is a circular opening or passageway -3 which extends practically to the Center of the key 4 and extending fromv this central passageway or`opening 3 are the two other passageways or openings 5 and 6 which extend at an angle to the opening 3 and which are less in diameter than the said opening 3. By 'providing these two openings 5 and 6 leading to the Center of the pin 4 and connecting withthe passageway 3 a sharp wedged portion 7 is formed which portion has the apex located centrally of the opening 3. v

Referring now for the moment to Fig. 5 it will be seen that when a Cotter vkey 8 is inserted from the main opening 3 the ends of the said `Cotter will contact with the apex of the Wedge portion 7 and on the further movement of the Cotter key 8 the arms of the'cotter 9 and 10 will be forced apart, the one arm 9 extending upwardly and the other arm 10 extending downwardly. This will bend the arms 9 and l() at a point directly at the end of the passageway 3 so that they will bite or Contact sharply with the shoulders 11 and 12 and tend to hold' the Cotter in its set position. Also the arms 9 and 10 will contact with the sides of the wedge portion 7 holding the arm out of direct alinement so that it is practically i1npossible for the key to be shaken or worked out and in reality necessitating a sharp blow on the ends of the arms 9 and 10 with a hammer or necessitating an instrument to be placed through the eye 13 of the Cotter and a good deal of force exerted thereon As shown in Figs. 7, 8 and 9 the functions are performed in the same way, but in this instance instead of having Circular openings or passageways 3, 5 and 6, a rectangular opening 14 and the vtwo branch openings 15 and 16 are shown for the reception of a square or rectangular cotter key although the round ones are the ones used mostly' in service.

From the foregoing it will be seen that very little Work or preparation has to be done on the pin -to put it in its finished shape, it being only necessary to correctly aline the openings or passageways 3, 5 and 6 or the openings 14, 15 and 16. Further that the cotter key is automatically spread or opened in its passage through the pin 1; and the arms are tightly clenched between the wedge portion 7 and the opposite sides of the opening 3. I am aware that it is old to provide a bolt and a nut with tortuous passageways therethrough and in alinement with each other and I am aware that it is old to form members'that are slipped over the end of a pin to open the cotter after it has completely passed through the opening in the pin, and I make no claim for such.

What I do claim, however, as newfand desire to secure by Letters Patent, is:

1. A pin having a passageway formed in one face of the shank and extending for a part of the Way through said shank, two passageways extending from the opposite face of said shank and intersecting with the first named passageway and providing a wedge portion between said last mentioned passageways.

2. A pin having a passageway formed in one 'face of the shank and two angular passageways extending from the opposite face of said shank and intersecting with the irst mentioned passageways in said shank, the last mentioned passageways having a lesser diameter than the irst mentioned passageway.

3. A pin having an inwardly extending opening in'one face of the shank and two openings intersecting with the iirst men- .tioned opening Jforming the apex of a tri- 'lar relation to each other and intersecting with the iirst mentioned opening, a cotter key adapted to be inserted in the first mentioned opening, the arms ofsaid cotter key being automatically forced away from each other when said cotter key is in its fixed position. i

5. rIhe combination of a cotter key and pin, said pin havingan opening in one facel of the shank intersecting with two angular openings extending from the opposite face of said shank thereby forming a wedge, the apex of said wedge. being located centrally of the mainopening, said cotter key being adapted to contact lwith the sides of the wedge and with the walls of the 'openings in the center of the shank of the pin.

6. A pin having an opening formed in one face of the shank, and two openings arranged in the opposite face of the shank of said pin and intersecting with said first mentioned opening to thereby form two oppositely positioned shoulders at the meeting point of the first mentioned openings and vsaid second mentioned openings, said second mentioned openings also forming a wedge portion located centrally of the main opening to thereby automatically spread the arms cfa cotter key when the same is forced through the first mentioned opening in the shank of said pin.

In testimony whereof I aiix my signature.

GEORGE H. FAI-IRENBRUCH. 

